package com.android.support.lib.universal.qr.landscape.code;

import java.util.Vector;

import com.android.support.lib.universal.R;
import com.android.support.lib.universal.qr.landscape.CaptureActivity;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.Result;

import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.net.Uri;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.Log;

/**
 * This class handles all the messaging which comprises the state machine for
 * capture.
 *
 * @author dswitkin@google.com (Daniel Switkin)
 */
public final class CaptureActivityHandler extends Handler {

	private static final String TAG = CaptureActivityHandler.class
			.getSimpleName();

	private final CaptureActivity activity;
	private final DecodeThread decodeThread;
	private State state;

	private enum State {
		PREVIEW, SUCCESS, DONE
	}

	public CaptureActivityHandler(CaptureActivity activity,
			Vector<BarcodeFormat> decodeFormats, String characterSet) {
		this.activity = activity;
		decodeThread = new DecodeThread(activity, decodeFormats, characterSet,
				new ViewfinderResultPointCallback(activity.getViewfinderView()));
		decodeThread.start();
		state = State.SUCCESS;

		// Start ourselves capturing previews and decoding.
		CameraManager.get().startPreview();
		restartPreviewAndDecode();
	}

	@Override
	public void handleMessage(Message message) {
		// switch (message.what) {
		// case R.id.auto_focus:
		// //Log.d(TAG, "Got auto-focus message");
		// // When one auto focus pass finishes, start another. This is the
		// closest thing to
		// // continuous AF. It does seem to hunt a bit, but I'm not sure what
		// else to do.
		// if (state == State.PREVIEW) {
		// CameraManager.get().requestAutoFocus(this, R.id.auto_focus);
		// }
		// break;
		// case R.id.restart_preview:
		// Log.d(TAG, "Got restart preview message");
		// restartPreviewAndDecode();
		// break;
		// case R.id.decode_succeeded:
		// Log.d(TAG, "Got decode succeeded message");
		// state = State.SUCCESS;
		// Bundle bundle = message.getData();
		// Bitmap barcode = bundle == null ? null :
		// (Bitmap) bundle.getParcelable(DecodeThread.BARCODE_BITMAP);
		// activity.handleDecode((Result) message.obj, barcode);
		// break;
		// case R.id.decode_failed:
		// // We're decoding as fast as possible, so when one decode fails,
		// start another.
		// state = State.PREVIEW;
		// CameraManager.get().requestPreviewFrame(decodeThread.getHandler(),
		// R.id.decode);
		// break;
		// case R.id.return_scan_result:
		// Log.d(TAG, "Got return scan result message");
		// activity.setResult(Activity.RESULT_OK, (Intent) message.obj);
		// activity.finish();
		// break;
		// case R.id.launch_product_query:
		// Log.d(TAG, "Got product query message");
		// String url = (String) message.obj;
		// Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
		// intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
		// activity.startActivity(intent);
		// break;

		int id = message.what;
		if (id == R.id.auto_focus) {
			if (state == State.PREVIEW) {
				CameraManager.get().requestAutoFocus(this, R.id.auto_focus);
			}
		}
		if (id == R.id.restart_preview) {
			restartPreviewAndDecode();
		}
		if (id == R.id.decode_succeeded) {
			state = State.SUCCESS;
			Bundle bundle = message.getData();
			Bitmap barcode = bundle == null ? null : (Bitmap) bundle
					.getParcelable(DecodeThread.BARCODE_BITMAP);

			activity.handleDecode((Result) message.obj, barcode);

		}
		if (id == R.id.decode_failed) {
			state = State.PREVIEW;
			CameraManager.get().requestPreviewFrame(decodeThread.getHandler(),
					R.id.decode);
		}
		if (id == R.id.return_scan_result) {
			if (activity != null) {
				activity.setResult(Activity.RESULT_OK, (Intent) message.obj);
				activity.finish();
			}
		}
		if (id == R.id.launch_product_query) {
			if (activity != null) {
				String url = (String) message.obj;
				Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
				intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
				activity.startActivity(intent);
			}

		}

	}

	public void quitSynchronously() {
		state = State.DONE;
		CameraManager.get().stopPreview();
		Message quit = Message.obtain(decodeThread.getHandler(), R.id.quit);
		quit.sendToTarget();
		try {
			decodeThread.join();
		} catch (InterruptedException e) {
			// continue
		}

		// Be absolutely sure we don't send any queued up messages
		removeMessages(R.id.decode_succeeded);
		removeMessages(R.id.decode_failed);
	}

	private void restartPreviewAndDecode() {
		if (state == State.SUCCESS) {
			state = State.PREVIEW;
			CameraManager.get().requestPreviewFrame(decodeThread.getHandler(),
					R.id.decode);
			CameraManager.get().requestAutoFocus(this, R.id.auto_focus);
			activity.drawViewfinder();
		}
	}

}
